2 * Copyright 2011-2013 Freescale Semiconductor, Inc.
3 * Copyright 2011 Linaro Ltd.
5 * The code contained herein is licensed under the GNU General Public
6 * License. You may obtain a copy of the GNU General Public License
7 * Version 2 or later at the following locations:
9 * http://www.opensource.org/licenses/gpl-license.html
10 * http://www.gnu.org/copyleft/gpl.html
13 #include <linux/clk.h>
14 #include <linux/clkdev.h>
15 #include <linux/cpu.h>
16 #include <linux/delay.h>
17 #include <linux/export.h>
18 #include <linux/init.h>
20 #include <linux/irq.h>
21 #include <linux/irqchip.h>
23 #include <linux/of_address.h>
24 #include <linux/of_irq.h>
25 #include <linux/of_platform.h>
26 #include <linux/pm_opp.h>
27 #include <linux/pci.h>
28 #include <linux/phy.h>
29 #include <linux/reboot.h>
30 #include <linux/regmap.h>
31 #include <linux/micrel_phy.h>
32 #include <linux/mfd/syscon.h>
33 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
34 #include <asm/mach/arch.h>
35 #include <asm/mach/map.h>
36 #include <asm/system_misc.h>
42 /* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
43 static int ksz9021rn_phy_fixup(struct phy_device *phydev)
45 if (IS_BUILTIN(CONFIG_PHYLIB)) {
46 /* min rx data delay */
47 phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
48 0x8000 | MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW);
49 phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0x0000);
51 /* max rx/tx clock delay, min rx/tx control delay */
52 phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
53 0x8000 | MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
54 phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0xf0f0);
55 phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
56 MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
62 static void mmd_write_reg(struct phy_device *dev, int device, int reg, int val)
64 phy_write(dev, 0x0d, device);
65 phy_write(dev, 0x0e, reg);
66 phy_write(dev, 0x0d, (1 << 14) | device);
67 phy_write(dev, 0x0e, val);
70 static int ksz9031rn_phy_fixup(struct phy_device *dev)
73 * min rx data delay, max rx/tx clock delay,
74 * min rx/tx control delay
76 mmd_write_reg(dev, 2, 4, 0);
77 mmd_write_reg(dev, 2, 5, 0);
78 mmd_write_reg(dev, 2, 8, 0x003ff);
84 * fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High
85 * as they are used for slots1-7 PERST#
87 static void ventana_pciesw_early_fixup(struct pci_dev *dev)
91 if (!of_machine_is_compatible("gw,ventana"))
97 pci_read_config_dword(dev, 0x62c, &dw);
98 dw |= 0xaaa8; // GPIO1-7 outputs
99 pci_write_config_dword(dev, 0x62c, dw);
101 pci_read_config_dword(dev, 0x644, &dw);
102 dw |= 0xfe; // GPIO1-7 output high
103 pci_write_config_dword(dev, 0x644, dw);
107 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609, ventana_pciesw_early_fixup);
108 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, ventana_pciesw_early_fixup);
109 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, ventana_pciesw_early_fixup);
111 static int ar8031_phy_fixup(struct phy_device *dev)
115 /* To enable AR8031 output a 125MHz clk from CLK_25M */
116 phy_write(dev, 0xd, 0x7);
117 phy_write(dev, 0xe, 0x8016);
118 phy_write(dev, 0xd, 0x4007);
120 val = phy_read(dev, 0xe);
123 phy_write(dev, 0xe, val);
125 /* introduce tx clock delay */
126 phy_write(dev, 0x1d, 0x5);
127 val = phy_read(dev, 0x1e);
129 phy_write(dev, 0x1e, val);
134 #define PHY_ID_AR8031 0x004dd074
136 static int ar8035_phy_fixup(struct phy_device *dev)
140 /* Ar803x phy SmartEEE feature cause link status generates glitch,
141 * which cause ethernet link down/up issue, so disable SmartEEE
143 phy_write(dev, 0xd, 0x3);
144 phy_write(dev, 0xe, 0x805d);
145 phy_write(dev, 0xd, 0x4003);
147 val = phy_read(dev, 0xe);
148 phy_write(dev, 0xe, val & ~(1 << 8));
151 * Enable 125MHz clock from CLK_25M on the AR8031. This
152 * is fed in to the IMX6 on the ENET_REF_CLK (V22) pad.
153 * Also, introduce a tx clock delay.
155 * This is the same as is the AR8031 fixup.
157 ar8031_phy_fixup(dev);
160 val = phy_read(dev, 0x0);
161 if (val & BMCR_PDOWN)
162 phy_write(dev, 0x0, val & ~BMCR_PDOWN);
167 #define PHY_ID_AR8035 0x004dd072
169 static void __init imx6q_enet_phy_init(void)
171 if (IS_BUILTIN(CONFIG_PHYLIB)) {
172 phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
173 ksz9021rn_phy_fixup);
174 phy_register_fixup_for_uid(PHY_ID_KSZ9031, MICREL_PHY_ID_MASK,
175 ksz9031rn_phy_fixup);
176 phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffef,
178 phy_register_fixup_for_uid(PHY_ID_AR8035, 0xffffffef,
183 static void __init imx6q_1588_init(void)
185 struct device_node *np;
187 struct clk *enet_ref;
191 np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-fec");
193 pr_warn("%s: failed to find fec node\n", __func__);
197 ptp_clk = of_clk_get(np, 2);
198 if (IS_ERR(ptp_clk)) {
199 pr_warn("%s: failed to get ptp clock\n", __func__);
203 enet_ref = clk_get_sys(NULL, "enet_ref");
204 if (IS_ERR(enet_ref)) {
205 pr_warn("%s: failed to get enet clock\n", __func__);
210 * If enet_ref from ANATOP/CCM is the PTP clock source, we need to
211 * set bit IOMUXC_GPR1[21]. Or the PTP clock must be from pad
212 * (external OSC), and we need to clear the bit.
214 clksel = clk_is_match(ptp_clk, enet_ref) ?
215 IMX6Q_GPR1_ENET_CLK_SEL_ANATOP :
216 IMX6Q_GPR1_ENET_CLK_SEL_PAD;
217 gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
219 regmap_update_bits(gpr, IOMUXC_GPR1,
220 IMX6Q_GPR1_ENET_CLK_SEL_MASK,
223 pr_err("failed to find fsl,imx6q-iomuxc-gpr regmap\n");
232 static void __init imx6q_axi_init(void)
237 gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
240 * Enable the cacheable attribute of VPU and IPU
243 mask = IMX6Q_GPR4_VPU_WR_CACHE_SEL |
244 IMX6Q_GPR4_VPU_RD_CACHE_SEL |
245 IMX6Q_GPR4_VPU_P_WR_CACHE_VAL |
246 IMX6Q_GPR4_VPU_P_RD_CACHE_VAL_MASK |
247 IMX6Q_GPR4_IPU_WR_CACHE_CTL |
248 IMX6Q_GPR4_IPU_RD_CACHE_CTL;
249 regmap_update_bits(gpr, IOMUXC_GPR4, mask, mask);
251 /* Increase IPU read QoS priority */
252 regmap_update_bits(gpr, IOMUXC_GPR6,
253 IMX6Q_GPR6_IPU1_ID00_RD_QOS_MASK |
254 IMX6Q_GPR6_IPU1_ID01_RD_QOS_MASK,
255 (0xf << 16) | (0x7 << 20));
256 regmap_update_bits(gpr, IOMUXC_GPR7,
257 IMX6Q_GPR7_IPU2_ID00_RD_QOS_MASK |
258 IMX6Q_GPR7_IPU2_ID01_RD_QOS_MASK,
259 (0xf << 16) | (0x7 << 20));
261 pr_warn("failed to find fsl,imx6q-iomuxc-gpr regmap\n");
265 static void __init imx6q_init_machine(void)
267 struct device *parent;
269 if (cpu_is_imx6q() && imx_get_soc_revision() == IMX_CHIP_REVISION_2_0)
270 imx_print_silicon_rev("i.MX6QP", IMX_CHIP_REVISION_1_0);
272 imx_print_silicon_rev(cpu_is_imx6dl() ? "i.MX6DL" : "i.MX6Q",
273 imx_get_soc_revision());
275 parent = imx_soc_device_init();
277 pr_warn("failed to initialize soc device\n");
279 imx6q_enet_phy_init();
281 of_platform_default_populate(NULL, NULL, parent);
284 cpu_is_imx6q() ? imx6q_pm_init() : imx6dl_pm_init();
289 static void __init imx6q_init_late(void)
292 * WAIT mode is broken on imx6 Dual/Quad revision 1.0 and 1.1 so
293 * there is no point to run cpuidle on them.
295 * It does work on imx6 Solo/DualLite starting from 1.1
297 if ((cpu_is_imx6q() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_1) ||
298 (cpu_is_imx6dl() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_0))
299 imx6q_cpuidle_init();
301 if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ))
302 platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0);
305 static void __init imx6q_map_io(void)
311 static void __init imx6q_init_irq(void)
314 imx_init_revision_from_anatop();
318 imx6_pm_ccm_init("fsl,imx6q-ccm");
321 static const char * const imx6q_dt_compat[] __initconst = {
328 DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad/DualLite (Device Tree)")
331 .smp = smp_ops(imx_smp_ops),
332 .map_io = imx6q_map_io,
333 .init_irq = imx6q_init_irq,
334 .init_machine = imx6q_init_machine,
335 .init_late = imx6q_init_late,
336 .dt_compat = imx6q_dt_compat,